HP Scitex LX850 HP Scitex LX850 & LX820 Printers: Maintenance and troubles - Page 70
Vertical Banding in the printed area fills
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Print-quality issues 1. Clean the substrate edge holders. See Clean the substrate edge holders on page 34. 2. Clean the line sensor and aerosol inlets. In some cases, fibers may accumulate around the inlets. See Clean the line sensor and aerosol inlets on page 30. 3. Clean the electrical connections to the printheads. See The front panel recommends replacing or reseating a printhead on page 82. If you see Vertical Bands in the printed area fills. This issue is caused because the substrate is not flat or because of wrinkles on the substrate, refer to The substrate is not flat on page 53 and There are wrinkles in the substrate on page 54 For information on how to adjust printer settings, see the User's guide. Vertical Banding in the printed area fills This issue is mostly caused because the substrate is not flat or because of wrinkles on the substrate, refer to The substrate is not flat on page 53 and There are wrinkles in the substrate on page 54 For information on how to adjust printer settings, see the User's guide. For more specific types of vertical banding in printed area fills refer to the following troubleshooting. Vertical Banding printing in the same color (gray, brown, green) A small amount of vertical banding (like waves) can be seen, with a frequency equal to or higher than 2.6cm (1"), up to approximately 5-10cm (2"-4") when printing a few specific large area fills of the same color (gray, brown, green) 1. Check that the substrate is correctly loaded , this is the most important cause of this type of vertical banding. 2. Reduce the heating temperature of the print as much as possible, without impacting the image quality (without increasing the coalescence issue). 64 Chapter 7 Troubleshoot print-quality issues ENWW